BH1415F
Audio ICs
1/3
Wireless Audio Link IC
BH1415F
The BH1415F is a FM stereo transmitter IC that transmits simple configuration. The IC consists of a stereo modulator for
generating stereo composite signals and a FM transmitter for broadcasting a FM signal on the air. The stereo modulator
generates a composite signal which consists of the MAIN, SUB, and pilot signal from a 38kHz oscillator.
The FM transmitter radiates FM wave on the air by modulating the carrier signal with a composite signal.
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!Applications
CD changer, Car TV, Car navigation, Wireless speakers, Personal computer (sound board), Game machine
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!Features
1) It is possible to improve the timbre because it has the pre-emphasis circuit, limiter circuit, and the low-pass filter circuit.
2) Built-in pilot-tone system FM stereo modulator circuit.
3) The transmission frequency is stable because it has a PLL system FM transmitter circuit.
4) PLL data input (CE, CK, DA) by serial input.
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!Absolute maximum ratings (Ta = 25°C, In measurement circuit.)
Supply voltage
Power dissipation
Storage temperature
Data input voltage
Phase comparator output voltage
∗
Derating : 4.5mW/°C for operation above Ta=25°C.
Parameter Symbol Limits Unit
V
CC
Pd
Tstg
V
V
V
mW
°C
+7.0
−0.3 to V
CC+0.3
−0.3 to V
CC+0.3
−55 to +125
Conditions
V
IN-D
VOUT-P
450
Pin8,12
Pin15,16,17,18
Pin7
∗
!
!!
!Recommended operating conditions (Ta = 25°C)
Audio input level
Parameter Symbol
Min.
Unit
V
CC V
V
V
°C
4.0
−40
−
Conditions
V
IN-A
f
IN-A
Topr
t
PRE
f
TX
V
IH
V
IL
20
−
70
0.8V
CC
GND
Max.
6.0
+85
−10
15k
155
120
V
CC
0.2VCC
Typ.
−
−
−
−
−
−
−
−
dBV
Hz
µsec
MHz
Pin8,12
Pin1,22
Pin1,22
Pin2,21
Pin9,11
Pin15,16,17,18
Pin15,16,17,18
Operating supply voltage
Operating temperature
Audio input frequency band
Pre-emphasis time constant set up range
Transmission frequency
Control terminal "H" level input voltage
Control terminal "L" level input voltage
